Nova Environmental Sound Level Meter

Accuracy
Class 1 – Model 41, Model 43, Model 45
Class 2 – Model 42, Model 44, Model 46

Applicable Standards
IEC 61672-1:2013 Class 1 or Class 2, Group X
IEC 60651:2001 Type 1 I or Type 2 I
IEC 60804:2000 Type 1 or Type 2
IEC 61252:1993 Personal Sound Exposure Meters
ANSI S1.4 -1983 (R2006), ANSI S1.43 – 1997 (R2007)
ANSI S1.25:1991
1:1 Octave Band Filters to IEC 61260 & ANSI S1.11-2004

Microphone
Class 1 PM1 pre-polarized
Class 2 PM2 pre-polarized

Microphone Preamplifier
PA40 Removable Preamplifier

Measurement Range
20dB -140dB RMS Single Range (143dB peak)

Noise Floor
<18dB(A) Class 1, <21dB(A) Class 2

Time Weightings
‘F’ (Fast), ‘S’ (Slow) & ‘I’ (Impulse) all measured simultaneously

Frequency Weightings
RMS & Peak: A, C, & Z (un-weighted) all measured simultaneously

Frequency Bands
10 1:1 Octave Bands: 31.5Hz to 16kHz

Integrators
Three simultaneously measuring “virtual” noise meters.
Integrator 1 is preset to Q3 for Leq functions.
Integrators 2 & 3 can be configured with:
Exchange Rate: 3, 4 or 5dB
Threshold: 70dB to 120dB (1dB steps)
Time Weighting: None or Slow
Criterion Level: 70dB to 120dB (1dB steps)
Criterion Time: 1 to 12 hours in 1 hour steps

Integrator Quick settings (pre-set)
EU, OSHA HC & OSHA NC, OSHA HC & ACGIH, MSHA HC & MSHA EC, Custom 1 & Custom 2

Ln Statistical Values
14 independent statistical Ln values calculated from 1/16th LAF
7 are preset to L1.0, L5.0, L10.0, L50.0, L90.0, L95.0 & L99.0
7 user defined Ln values

Time History Data Rates (Global settings)
10ms, 62.5ms, 125ms, 250ms, 1/2 sec, 1 sec, 2 sec (user selectable)

Language options
English, French, German, Italian, Spanish as standard

NB. Other language options will be available.

Batteries
6 x AA

Battery life
Typically 30 hours with Alkaline AA
Typically 50 hours with Lithium AA
Rechargeable battery life depends on type and screen brightness

External power
5v-15v via Multipin I/O socket

Weight
440g without batteries

Size
280mm x 80mm x 42mm with preamp and microphone

Connections
USB 2.0 Mini-B to PC
AC output via 3.5mm Stereo jack
AC & DC output via Multipin I/O socket

Tripod Mount
1/4” Whitworth socket

Case
Die cast aluminium with silicon elastomer keypad and soft touch back

Display
High resolution anti-glare OLED display
Ambient light sensor
Illuminated keypad

Supplied Accessories
Windshield, Wrist Strap, USB Download Cable, AnalyzerPlus software, AA Batteries

Environmental
Operating Temperature: -10°C to +50°C
Storage Temperature: -20°C to +60°C
Humidity: Up to 95% RH Non-Condensing

Electromagnetic performance
IEC 61672-1:2013 & IEC 61672-2:2013
Except where modified by EN 61000-6-1:2007 & EN 61000-6-2:2007

Logging and Storage
Memory: 4GB removable memory card
Audio Note Recording: A spoken note (up to 30 seconds) attached to measurements
Audio Recording: Manual, 48kHz/32bit WAV format

Measurement Control
Record and store data over fixed times: 1 min, 5 min, 10 min, 15 min, 30 min, 1 hour, Lden
Automatic Synchronisation & Repeat options
Pause
Back Erase with user selectable duration (via AnalyzerPlus software)

Standard Measurement Parameters
Model 41 & Model 42:
Lxy, Lxy Max, Lxy Min
Time, date & duration of measurement
Extra measurement and stored functions available

Model 43 & Model 44:
Lxy, Lxy Max, Lxy Min
Lxeq, LCPeak, LZPeak, LAPeak, LCeq-LAeq, LxE, LAIeq
Graph of Short LAeq, LCPeak
Time, date & duration of measurement
Extra measurement and stored functions available

Model 45 & Model 46:
Lxy, Lxy Max, LxyMin
Lxeq, LCPeak, LZPeak, LAPeak, LCeq-LAeq, LxE, LAeqT
Graph of Short LAeq, LCPeak
Measurement Run Time
Integrators 2 & 3: TWA, Dose %, Est Dose %
Real-Time 1:1 Octave Bands (Graphical & Numeric)
14 Statistical Values (Ln)

Stored Parameters – Model 45 & Model 46
LxyMax & Time History of LxyMax
LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq
Time History of LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq
Integrators 2 & 3: LAVG , TWA. % Dose
Time History of LAVG
1:1 Octave Bands: Overall Leq & Leq Time History for each band
Ln Values: 14 independent statistical values
Audio recording during measurement
Time, date & duration of measurement

Where x means the three frequency weightings A, C and Z and y means the three time weightings ‘S’ (Slow), ‘F’ (Fast) and ‘I’ (Impulse). All weightings simultaneously measured where appropriate.

Other functions may be calculated by the AnalyzerPlus software.